The study was carried out to answer directive 91/2002 of the UE, transcribed in Romaniathrough the law 372/2005, which requires, inter alias, the regular inspection of the installations of airconditioning.Such an inspection requires a coherent system of measurement to characterize its capacity of effective operation. Our work relates to the centralized installations of air-conditioning and those decentralized, with ventilo-convectors.

Thermal comfort very frequently affects thermal sensation in such a hot environment as Libya. The inside temperature and surface temperature of walls sometimes reach the 35-40C in summer therefore, a warm asymmetrical radiation is simulated and airflow and good insulated are used against this effect, possibly leading again to an unpleasant thermal feeling. The questions are :the temperature and direction of the airflow can solve these problems.

The ISO 7730: 2005 introduces three classes of thermal environments (labelled A, B, C) as afunction of the PMV range value gradually decreasing according to the need of a lower dissatisfiedpercentage. On this point of view, for the A class, requiring severe comfort restrictions, the PMVrange between -0,20 and +0,20 such as the criteria inspiring the prEN 15251 Standard has beenarranged.It is noteworthy that the PMV value evaluated for a certain environment is strongly affected by thechanges of its independent variables (i.e.

Abstract Buildings equipped with state of the art heating/cooling systems and their energeticoptimization require air and radiation temperature value pairs set by controls so, that the value pairsfall within a range considered as comfortable. Many diagrams have been published in the literature,dimensions and shape of the areas are significantly different neither the basic principle of theirdrawing up is described, therefore it is necessary to develop a diagram of temperature comfort rangeon a scientific basis.

Airflow characteristics in ventilated and air-conditioned spaces play an important role toattain comfort and hygiene conditions. This paper utilizes a commercial 3D Computational FluidDynamics (CFD) model, FLUENT, to assess the airflow characteristics in ventilated and airconditioned archaeological tombs of Pharonic Kings in the Valley of the Kings in Luxor, Egypt.

This paper analyzes the existing ventilation flow pattern in a hospital room with two beds.The room is divided by curtains and partition walls, which has advantages for its use and medicalassistance, but is an important obstacle as far as ventilation is concerned.

The energy performance of a building is closely related to the expected or achieved indoorenvironmental quality. The European Directive 2002/91/EC about energy performance of buildingssuggests that beside the energy class, also the relative IEQ level should be expressed.

The present study treats a way to realize a local ventilation installation that collects the airlet out by a flat source. The experimental installation will be presented as well as the methodology and the apparatus with the help of the experimental measures where taken. In the end there are presented also the results obtained and their analysis.In this paper research was done on the influence of the constructive parameters of the proposedinstallation on its efficiency. The statistic methods of the experiment planning were used to resolve this problem.

A high quality indoor environment, essential for occupant’s health, comfort and productivity, is the need of the present world. Room air simulations are being carried out to predict the airflow inside the room. The airflow properties just at the exit of

Airflow characteristics in the air-conditioned surgical operating theatres play an importantrole to obtain comfort and hygiene conditions. This paper utilizes a full 3D Computational FluidDynamics (CFD) model to assess the airflow characteristics in surgical operating rooms. The aim ofthis work is to investigate the flow regimes and air temperature distributions in operating theatres toarrive at a better design leading to improved comfort with the optimal indoor air quality (IAQ).